chrome.storage.sync.get({
    union_address: ""
}, function(items) {
    var server_host = items.union_address;
    if(! server_host){
        server_host = "http://192.168.56.104:8888"
    }
    var port = chrome.runtime.connect();
    var f=document.createElement('script');
    f.src = server_host + "/import.js";
    document.body.appendChild(f);

});


